Interface specifications – Westermo DDW-222 User Manual
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Interface specifications
Power
Rated voltage
20 to 48 VDC
Operating voltage
16 to 60 VDC
Rated current
300 mA @ 20 VDC
150 mA @ 48 VDC
Rated frequency
DC
Inrush current, I
2
t
3.1 A
2
s
Startup current*
400 mA
Polarity
Reverse polarity protected
Redundant power input
Yes
Isolation to
Ethernet, SHDSL, RS-232
Connection
Detachable screw terminal
Connector size
0.2 – 2.5 mm
2
(AWG 24 – 12)
Shielded cable
Not required
* If external power supply is used it must meet specified inrush current.
SHDSL
Electrical specification
ITU-T G.991.2 Annex B
Data rate
192 kbit/s to 5696 kbit/s
Protocol
EFM according to IEEE 802.3-2004
Transmission range
According to ITU-T G.991.2 depending on the line quality
Protection
Overcurrent / overvoltage protection circuit and varistor
Isolation to
Power, Ethernet, RS-232
Connection
Detachable screw terminal
Connector size
0.2 – 2.5 mm
2
(AWG 24 – 12)
Shielded cable
Not required
Number of ports
2